In the anime

Pikachu starts to run forward on all fours, leaping from side to side. Other times, Pikachu appears to repeatedly vanish and immediately reappears in different spots while running. The opponent may become confused.

In the manga

In The Electric Tale of Pikachu manga

Pikachu gathers electricity in its body and static electricity appears around its tail. Its fur then gets slightly more spiky and it dashes forward. As it runs, it leaves behind little trails of energy from its back feet.

In the Pokémon Adventures manga

An orb of energy appears in front of Dragonair's horn, and it calls upon a strong gust of wind. It then rides and controls the wind to speed itself up. It also can spin around the opponent to trap them in a tornado.